Traditionally, the number of attacks increases after dark, Censor.NET reports citing the ATO press center.
According to the report, the militants fired at the Army's strongholds at Zaitseve, Novhorodske, Luhanske from small arms, heavy machine guns and grenade launchers in the Donetsk sector.
The ATO forces' positions near Zaitseve were shelled with 82-mm and 120-mm mortars.
Read more: Three Ukrainians released from terrorists' captivity, - Poroshenko (updated). PHOTOS
In the Mariupol sector, pro-Russian militants fired at the Army's positions at Marinka town and Novotroitske village from heavy machine guns and grenade launchers. Ukrainian positions at the village of Berezove were shelled with an anti-aircraft gun.
Ukrainian soldiers were forced to fire back from small arms in some sectors along the front line.
Militants have reduced their activity at midnight.
Read more: "Pressing Russia with sanctions and resisting Kremlin's propaganda," - Klimkin elaborated on Crimea's de-occupation startegy
Related materials: Anti-Terrorist Operation